Penyediaan kaca aerosilika daripada sekam padi

The aim of this study is to prepare aerosilica glass from silica aerogel synthesized from rice husk. The study was carried out in order to produce a low thermal conductivity aerosilica glass that can be used as thermal insulator. Aerosilica glasses of nominal composition 5 %-55 % mol of aerogel were...

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Main Author:	Abdullah, Rozieyati
Format:	Thesis
Language:	English
Published:	2004
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/5343/1/RozieyatiAbdullahMFS2004.pdf
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id	my-utm-ep.5343
record_format	uketd_dc
spelling	my-utm-ep.53432018-03-07T20:57:49Z Penyediaan kaca aerosilika daripada sekam padi 2004-03 Abdullah, Rozieyati QD Chemistry The aim of this study is to prepare aerosilica glass from silica aerogel synthesized from rice husk. The study was carried out in order to produce a low thermal conductivity aerosilica glass that can be used as thermal insulator. Aerosilica glasses of nominal composition 5 %-55 % mol of aerogel were prepared using a mixture of aerogel, SiOz with sodium carbonate, Na2C03. The glass samples of (Si02)@a20)1, were produced using liquid melt quenchng method at the melting temperature about 1 100 "C for aerosilica glass and 1400 "C for conventional sodium silicate glass. The study shows aerosilica glass is amorphous and exhibits better properties compared to conventional sodmn silicate glass with an optimum composition.of 20 % mol aerogel with density 2.39 g cm", thermal conductivity value of 1.35 ~ m k ' and Vickers micro hardness value of 412 Hv. According to the infrared spectrum, ths phenomena can be related to the structure of Si-0-Si bonds. The presence of foams by SEM micrograph contributes to the low thermal conductivity of aerosilica glass due to the formation of a new closed pores of 8 pm to 89 pm insize. The MAS-NMR spectra indicate a larger number of bridging 2 3 oxygen with Si atom in aerosilica glass as present Q ,Q and ~"pesies. The differential thermal analyzer shows aerosilica glass can be obtained at a lower temperature range of 8 18-828 "C which is stable against corrosive agents. W-VISNIR analysis shows the samples absorbance in UV light range is related to thermal conductivity. 2004-03 Thesis http://eprints.utm.my/id/eprint/5343/ http://eprints.utm.my/id/eprint/5343/1/RozieyatiAbdullahMFS2004.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Abdullah, Rozieyati Penyediaan kaca aerosilika daripada sekam padi
description	The aim of this study is to prepare aerosilica glass from silica aerogel synthesized from rice husk. The study was carried out in order to produce a low thermal conductivity aerosilica glass that can be used as thermal insulator. Aerosilica glasses of nominal composition 5 %-55 % mol of aerogel were prepared using a mixture of aerogel, SiOz with sodium carbonate, Na2C03. The glass samples of (Si02)@a20)1, were produced using liquid melt quenchng method at the melting temperature about 1 100 "C for aerosilica glass and 1400 "C for conventional sodium silicate glass. The study shows aerosilica glass is amorphous and exhibits better properties compared to conventional sodmn silicate glass with an optimum composition.of 20 % mol aerogel with density 2.39 g cm", thermal conductivity value of 1.35 ~ m k ' and Vickers micro hardness value of 412 Hv. According to the infrared spectrum, ths phenomena can be related to the structure of Si-0-Si bonds. The presence of foams by SEM micrograph contributes to the low thermal conductivity of aerosilica glass due to the formation of a new closed pores of 8 pm to 89 pm insize. The MAS-NMR spectra indicate a larger number of bridging 2 3 oxygen with Si atom in aerosilica glass as present Q ,Q and ~"pesies. The differential thermal analyzer shows aerosilica glass can be obtained at a lower temperature range of 8 18-828 "C which is stable against corrosive agents. W-VISNIR analysis shows the samples absorbance in UV light range is related to thermal conductivity.
format	Thesis
qualification_level	Master's degree
author	Abdullah, Rozieyati
author_facet	Abdullah, Rozieyati
author_sort	Abdullah, Rozieyati
title	Penyediaan kaca aerosilika daripada sekam padi
title_short	Penyediaan kaca aerosilika daripada sekam padi
title_full	Penyediaan kaca aerosilika daripada sekam padi
title_fullStr	Penyediaan kaca aerosilika daripada sekam padi
title_full_unstemmed	Penyediaan kaca aerosilika daripada sekam padi
title_sort	penyediaan kaca aerosilika daripada sekam padi
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2004
url	http://eprints.utm.my/id/eprint/5343/1/RozieyatiAbdullahMFS2004.pdf
_version_	1747814584460247040

Penyediaan kaca aerosilika daripada sekam padi

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